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Since this week's security update, YouTube will not fullscreen in Safari. Help?

I did the security update 2015 - 005 yesterday, and now YouTube will not fullscreen. It still works correctly in Chrome. Help?

MacBook Pro, OS X El Capitan (10.11.2), 22 HD Cintiq

Posted on Dec 9, 2015 5:00 PM

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20 replies

Dec 17, 2015 12:17 PM in response to atpeter

El Capitan is supposed to be the most advanced operating system and has automatic security updates. I don't trust 3rd party security software. Read the reviews on the App Store about Kaspersky and make up your own mind. I don't believe that this YouTube issue is a trojan horse or any other security issue. It came about directly after the last Apple security update. This is an Apple issue that I'm sure they'll fix eventually.

Since this week's security update, YouTube will not fullscreen in Safari. Help?

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